[cairo] missing return values in PS backend

[Carl Worth]

On Sat, 02 Jul 2005 13:53:37 -0400, Jason Dorje Short wrote:
> Some functions don't have any return values.  I didn't really know what
> they should return but this patch at least adds something.

I was waiting for Kristian to correct this code.

But the warnings were annoying me too much this evening. It looks like
the offending code isn't currently being used, so I've #ifdef 0'ed it
out for now.

-Carl
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